What is this...

This is nasty and I know but my period was supposed to start on Wednesday and I’ve had pms symptoms like sore boobs and slight lower body cramps and a headache. Is this just pms or something else please help im scared. I read it could be implantation bleeding but implantation starts a week before a period is supposed to start. I lost my virginity last week but we used a condom and he didn’t cum.